<template>
  <div id="aCoursesList" class="bg-fa of">
    <!-- /课程详情 开始 -->
    <section class="container">
      <section class="path-wrap txtOf hLh30">
        <a href="#" title class="c-999 fsize14">首页</a>
        \
        <a href="#" title class="c-999 fsize14">{{courseWebVo.subjectLevelOne}}</a>
        \
        <span class="c-333 fsize14">{{courseWebVo.subjectLevelTwo}}</span>
      </section>
      <div>
        <article class="c-v-pic-wrap" style="height: 357px;">
          <section class="p-h-video-box" id="videoPlay">
            <img height="357px" :src="courseWebVo.cover" :alt="courseWebVo.title" class="dis c-v-pic">
          </section>
        </article>
        <aside class="c-attr-wrap">
          <section class="ml20 mr15">
            <h2 class="hLh30 txtOf mt15">
              <span class="c-fff fsize24">{{courseWebVo.title}}</span>
            </h2>
            <section class="c-attr-jg">
              <span class="c-fff">价格：</span>
              <b class="c-yellow" style="font-size:24px;">￥{{courseWebVo.price}}</b>
            </section>
            <section class="c-attr-mt c-attr-undis">
              <span class="c-fff fsize14">主讲： {{courseWebVo.teacherName}}&nbsp;&nbsp;&nbsp;</span>
            </section>
            <section class="c-attr-mt of">
              <span class="ml10 vam">
                <em class="icon18 scIcon"></em>
                <a class="c-fff vam" title="收藏" href="#" >收藏</a>
              </span>
            </section>
            <section class="c-attr-mt" v-if="isBuy || Number(courseWebVo.price)===0">
              <a href="#" title="立即观看" class="comm-btn c-btn-3">立即观看</a>
            </section>
            <section class="c-attr-mt" v-else>
              <a href="#" title="立即购买" class="comm-btn c-btn-3" @click="createOrders()">立即购买</a>
            </section>
          </section>
        </aside>
        <aside class="thr-attr-box">
          <ol class="thr-attr-ol">
            <li>
              <p>&nbsp;</p>
              <aside>
                <span class="c-fff f-fM">购买数</span>
                <br>
                <h6 class="c-fff f-fM mt10">{{courseWebVo.buyCount}}</h6>
              </aside>
            </li>
            <li>
              <p>&nbsp;</p>
              <aside>
                <span class="c-fff f-fM">课时数</span>
                <br>
                <h6 class="c-fff f-fM mt10">{{courseWebVo.lessonNum}}</h6>
              </aside>
            </li>
            <li>
              <p>&nbsp;</p>
              <aside>
                <span class="c-fff f-fM">浏览数</span>
                <br>
                <h6 class="c-fff f-fM mt10">{{courseWebVo.viewCount}}</h6>
              </aside>
            </li>
          </ol>
        </aside>
        <div class="clear"></div>
      </div>
      <!-- /课程封面介绍 -->
      <div class="mt20 c-infor-box">
        <article class="fl col-7">
          <section class="mr30">
            <div class="i-box">
              <div>
                <section id="c-i-tabTitle" class="c-infor-tabTitle c-tab-title">
                  <a name="c-i" class="current" title="课程详情">课程详情</a>
                </section>
              </div>
              <article class="ml10 mr10 pt20">
                <div>
                  <h6 class="c-i-content c-infor-title">
                    <span>课程介绍</span>
                  </h6>
                  <div class="course-txt-body-wrap">
                    <section class="course-txt-body">
                      <p v-html="courseWebVo.description">{{courseWebVo.description}}</p>
                    </section>
                  </div>
                </div>
                <!-- /课程介绍 -->
                <div class="mt50">
                  <h6 class="c-g-content c-infor-title">
                    <span>课程大纲</span>
                  </h6>
                  <section class="mt20">
                    <div class="lh-menu-wrap">
                      <menu id="lh-menu" class="lh-menu mt10 mr10">
                        <ul>
                          <!-- 文件目录 -->
                          <li class="lh-menu-stair" v-for="chapter in chapterVideoList" :key="chapter.id">
                            <a href="javascript: void(0)" :title="chapter.title" class="current-1">
                              <em class="lh-menu-i-1 icon18 mr10"></em>{{chapter.title}}
                            </a>

                            <ol class="lh-menu-ol" style="display: block;">
                              <li class="lh-menu-second ml30" v-for="video in chapter.children" :key="video.id">
                                <a :href="'/player/'+video.videoSourceId" target="_blank">
                                  <span class="fr">
                                    <i class="free-icon vam mr10">免费试听</i>
                                  </span>
                                  <em class="lh-menu-i-2 icon16 mr5">&nbsp;</em>{{video.title}}
                                </a>
                              </li>
                            </ol>
                          </li>
                        </ul>
                      </menu>
                    </div>
                  </section>
                </div>
                <!-- /课程大纲 -->
              </article>
            </div>
          </section>
        </article>
        <aside class="fl col-3">
          <div class="i-box">
            <div>
              <section class="c-infor-tabTitle c-tab-title">
                <a title href="javascript:void(0)">主讲讲师</a>
              </section>
              <section class="stud-act-list">
                <ul style="height: auto;">
                  <li>
                    <div class="u-face">
                      <a :href="'/teacher/'+courseWebVo.teacherId">
                        <img :src="courseWebVo.avatar" width="50" height="50" alt>
                      </a>
                    </div>
                    <section class="hLh30 txtOf">
                      <a class="c-333 fsize16 fl" :href="'/teacher/'+courseWebVo.teacherId">{{courseWebVo.teacherName}}</a>
                    </section>
                    <section class="hLh20 txtOf">
                      <span class="c-999">{{courseWebVo.intro}}</span>
                    </section>
                  </li>
                </ul>
              </section>
            </div>
          </div>
        </aside>
        <div class="clear"></div>
      </div>

      <div class="mt50 commentHtml">
        <div>
          <h6 class="c-c-content c-infor-title" id="i-art-comment">
            <span class="commentTitle">课程评论</span>
          </h6>
          <section class="lh-bj-list pr mt20 replyhtml">
            <ul>
              <li class="unBr">
                <aside class="noter-pic">
                  <img width="50" height="50" class="picImg" src="~/assets/img/avatar-boy.gif">
                </aside>
                <div class="of">
                  <section class="n-reply-wrap">
                    <fieldset>
                      <textarea name="" v-model="comment.content" placeholder="输入您要评论的文字" id="commentContent"></textarea>
                    </fieldset>
                    <p class="of mt5 tar pl10 pr10">
                      <span class="fl "><tt class="c-red commentContentmeg" style="display: none;"></tt></span>
                      <input type="button" @click="addComment()" value="回复" class="lh-reply-btn">
                    </p>
                  </section>
                </div>
              </li>
            </ul>
          </section>
          <section class="">
            <section class="question-list lh-bj-list pr">
              <ul class="pr10">
                <li v-for="(comment,index) in data.items" v-bind:key="index">
                  <aside class="noter-pic">
                    <img width="50" height="50" class="picImg" :src="comment.avatar">
                  </aside>
                  <div class="of">
                      <span class="fl">
                      <font class="fsize12 c-blue">
                        {{comment.nickname}}</font>
                      <font class="fsize12 c-999 ml5">评论：</font></span>
                  </div>
                  <div class="noter-txt mt5">
                    <p>{{comment.content}}</p>
                  </div>
                  <div class="of mt5">
                    <span class="fr"><font class="fsize12 c-999 ml5">{{comment.gmtCreate}}</font></span>
                  </div>
                </li>
              </ul>
            </section>
          </section>

          <!-- 公共分页 开始 -->
          <div class="paging">
            <!-- undisable这个class是否存在，取决于数据属性hasPrevious -->
            <a
              :class="{undisable: !data.hasPrevious}"
              href="#"
              title="首页"
              @click.prevent="gotoPage(1)">首</a>
            <a
              :class="{undisable: !data.hasPrevious}"
              href="#"
              title="前一页"
              @click.prevent="gotoPage(data.current-1)">&lt;</a>
            <a
              v-for="page in data.pages"
              :key="page"
              :class="{current: data.current == page, undisable: data.current == page}"
              :title="'第'+page+'页'"
              href="#"
              @click.prevent="gotoPage(page)">{{ page }}</a>
            <a
              :class="{undisable: !data.hasNext}"
              href="#"
              title="后一页"
              @click.prevent="gotoPage(data.current+1)">&gt;</a>
            <a
              :class="{undisable: !data.hasNext}"
              href="#"
              title="末页"
              @click.prevent="gotoPage(data.pages)">末</a>
            <div class="clear"/>
          </div>
          <!-- 公共分页 结束 -->
        </div>
      </div>

    </section>
    <!-- /课程详情 结束 -->
  </div>
</template>

<script>
import courseApi from '@/api/course'
import commentApi from '@/api/commen'
import ordersApi from '@/api/orders'
import cookie from 'js-cookie'

export default {
  asyncData({ params, error }) {
    return {courseId: params.id}
  },
  data() {
    return {
      data:{},
      page:1,
      limit:10,
      total:10,
      comment:{
        content:'',
        courseId:''
      },
      courseWebVo: {},
      chapterVideoList: [],
      isBuy: false,
    }
  },
  created() {
    this.initCourseInfo()
    this.initComment()
  },
  methods:{
    //查询课程信息
    initCourseInfo() {
      courseApi.getCourseInfo(this.courseId)
        .then(response => {
          this.courseWebVo=response.data.data.courseWebVo,
          this.chapterVideoList=response.data.data.chapterVideoList,
          this.isBuy=response.data.data.isBuy
        })
    },
    //生成订单
    createOrders(){
      var userStr = cookie.get('user_ucenter')
      if (!userStr) {
        this.$message({
          type: 'error',
          message: '请先登录!',
        })
      }
      ordersApi.createOrders(this.courseId)
        .then(response=>{
          this.$router.push({path:'/orders/'+response.data.data.orderId})
        })
    },
    //查询评论
    initComment(){
        commentApi.getCommentPageList(this.page, this.limit, this.courseId)
          .then(response => {
            this.data = response.data.data
          })
    },
    //添加评论
    addComment(){
      var userStr = cookie.get('user_ucenter')
      if (!userStr){
        this.$message({
          type: 'error',
          message: '请先登录!',
        })
        if (!this.comment.content){
          this.$message({
            type: 'error',
            message: '评论失败，内容不能为空!',
          })
        }else {
          this.comment.courseId = this.courseId
          this.comment.teacherId = this.courseWebVo.teacherId
          commentApi.addComment(this.comment)
            .then(response => {
              //提示信息
              this.$message({
                type: 'success',
                message: '评论成功!',
              })
              if(response.data.success){
                this.comment.content = ''
                this.initComment()
              }
            })
        }
      }
    },
    //分页
    gotoPage(page){
      commentApi.getCommentPageList(page, this.limit,this.courseId)
        .then(response => {
        this.data = response.data.data
      })
    }
  }
};
</script>
